<template>
  <!-- 转场太生硬，加上动画 -->
  <transition name="slide" appear>
    <music-list :songs="songs" :title="title" :bg-image="bgImage">歌手详情</music-list>
  </transition>
</template>

<script type="text/ecmascript-6">
import {mapGetters} from 'vuex'
import {getSingerDetail} from 'api/singer'
import {ERR_OK} from 'api/config'
import {createSong, isValidMusic, processSongsUrl} from 'common/js/song'
import MusicList from 'components/music-list/music-list'

export default {
  components: {
    MusicList
  },
  data () {
    return {
      songs: []
    }
  },
  computed: {
    // 传递给MusicList子组件的歌手名称和头像，作为标题和背景图片
    title () {
      return this.singer.name
    },
    bgImage () {
      return this.singer.avatar
    },
    ...mapGetters([
      'singer'
    ])
  },
  created () {
    this._getSingerDetail()
  },
  methods: {
    _getSingerDetail () {
      if (!this.singer.id) {
        this.$router.push('/singer')
      }
      getSingerDetail(this.singer.id).then((res) => {
        if (res.code === ERR_OK) {
          processSongsUrl(this._normalizeSongs(res.data.list)).then((songs) => {
            this.songs = songs
            // console.log(this.songs)
          })
        }
      })
    },
    _normalizeSongs (list) {
      let ret = []
      list.forEach((item) => {
        let {musicData} = item
        if (isValidMusic(musicData)) {
          ret.push(createSong(musicData))
        }
      })
      return ret
    }
  }
}
</script>

<style scoped lang="stylus" rel="stylesheet/stylus">
  @import "~common/stylus/variable"

  .singer-detail
    position: fixed
    z-index: 100
    top: 0
    left: 0
    right: 0
    bottom: 0
    background: $color-background

  .slide-enter-active, .slide-leave-active
    transition: all 0.3s
  .slide-enter, .slide-leave-to
    transform: translate3d(100%, 0, 0)
</style>
